ML20083J850

Forwards Info in Response to 831026 Request for References Which Document Sitespecific Applicable Factor for Mixing Effect of Discharge Structure

ML20083J850
Person / Time
Site:	Callaway
Issue date:	12/30/1983
From:	Schnell D UNION ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML20083F755	List: ML20083F753 ML20083J850 ML20083J876
References
ULNRC-711, NUDOCS 8401100339
Download: ML20083J850 (6)

Text

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UNION ELECTRIC COM PANY 1501 GRATIOT STREET ST. louts, MISSOURI MAltlNG ADDetESS:

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December 30, 1983 ,7 ,,f;gj;,",'ff, ,,,,,

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i Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Denton:

ULNRC-711 DOCKET NUMBER 50-483 CALLAWAY PLANT, UNIT 1 l OFFSITE DOSE CALCULATION MANUAL l 1

References:

1) NRC Letter dated October 26, 1983, l from B. J. Youngblood

2) ULNRC-688, dated November 22, 1983 l Attachments: 1) NEO-54 dated January 5, 1983

2) Edinger Report, dated December 1,1982

3) Benedict Report, dated April 4, 1974 In Reference 1 NRC provided comments on the Callaway Offsite Dose Calculation Manual (ODCM). Union Electric responded with Revision 1 to the ODCM, which was transmitted by Reference 2. In addition, Reference 1, item 2 (j) requested a copy of the references which document the site specific applicable factor for the mixing effect of the discharge structure. Attachments 1, 2 and 3 provide these references.

If there are any questions, please contact us.

Very truly yours,

. j" Donald F. Schnell DS/lw l' 8401100339 831230 A Fy00$

gDRADDCK 05000483 PDR

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STATE OF MISSOURI ) l

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CITY OF ST. LOUIS ) '

Donald F. Schnell, of lawful age, being first duly sworn l upon oath says that he is Vice President-Nuclear and an officer of Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.

m By ~

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Donald F. Schnell Vice President Nuclear SUBSCRIBED and sworn to before me this 38 b day of d, 198 3, l

n BARBARA J. PFAFF 11/

NOTAhY PUBUC STATE OF P.flSS0t!Rl NY COMMISSION EXPIRES APRIL 22.1535 ST. LOUIS COUNTY e

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cc: Glenn L. Koester Vice President Operations Kansas Gas & Electric P.O. Box 208 Wichita, Kansas 67201 Donald T. McPhee Vice President Kansas City Power and Light Company 1330 Baltimore Avenue Kansas City, Missouri 64141 Gerald Charnoff, Esq.

Shaw, Pittman, Potts & Trowbridge 1800 M. Street, N.W.

Washington, D.C. 20036 Nicholas A. Petrick Executive Director SNUPPS 5 Choke Cherry Road Rockville, Maryland 20850 John H. Neisler Callaway Resident Office U.S. Nuclear Regulatory Commiesion RRil Steedman, Missouri 65077 Jim Konklin Division of Projects and Resident Programs, Chief, Section lA U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

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Mr. S. E. Miltenberger: NEO-54 OFF-SITE DOSE CALCULATION MANUAL ,

NEAR FIELD DILUTION FACTOR Ref: UOTH 82-238 dated 12/13/8 2 In response to the referenced letter, a near field dilution factor (Ft) of 1.38x10-4 should be used for liquid releases. FSAR Table 11.2-2 does not apply since those dilution . factors relate to a dilution of the discharge structure exit flow by the river flow. Ft (NUREG-0133) relates to a dilution of the radwaste building exit flow by the blowdown dilution flow and the river flow. In addition, the methodology used to calculate the values given in FSAR Table 11.2-2 is restricted to those portions of the river removed from influences of the discharge and therefore does not apply to the "near field".

As defined in UUREG-0133 :

Fg = liquid radioactive waste flow per unit discharge structure exit flow per unit x Applicable Factor where:

liquid radioactive waste flow = 0.0893x106 gpd (0.138 cf s) (as limited by our requested NPDES revision) discharge structure exit flow = 5000 gpm (11.14 cfs)

The Applicable Factor (initial plume dilution in river) was calculated by J. E. Edinger (1982) in support of testimony on suspended sediment discharge. Dr. Edinger's values vary from a low of 6:1 in January, 1977 at the lowest monthly flow of 22,000 cfs to a high of 774:1 in April, 1973 at the highest monthly flow of 333,000 cfs. The annual average from 1970 to 1980 is approximately 101:1. Benedict (1974 thermal plume dilution) estimated a plume dilution of 10:1 within a 30 foot by 100 foot region of the discharge of low flow, hence the t0o-dimensional hydrodynamic computations used by Dr. Edinger slightly underestimate (conservative) initial discharge dilution.

) From the above discus.eion:

l Applicable Factor = 101.

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l However, since the discharge structure exit flow x Applicable ,

Factor is limited to 1000 by NUREG-0133, then Applicable Factor = 89.77 it follows:

Fg = 0.138 = 0.13_8_

11.14 x 89.77 1000 F g = 1.38 x 10-4 N

_.) 5. 'LW D. W. Capone NSG/lw cc: 3456-0545.11 A. C. Passwater N. G. Slaten J. P. Head

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1 March 31, 1983 Mr. J. R. Peevy:

ODCM NEAR FIELD DILUTION FACTOR Ref.:

UOTH 83-86 dated March 15, 1983 is a copy of the Edinger report.Per your request in the referenced letter, at done by Dr.

Benedict can be found in Appendix SA of theThe thermal plume s Environmental Report - Construction Permit .

Stagetion m

'the Calcula-described in NEO-54 dated January 5, 1983.

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